James reynolds



.l. REYNOLDS.

, Q Fi nis hing Soft Rubber Articles. No. 16.215. Patented Dec. 9,1856.

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UNITED STATES PATENT EBTDE.

JAMES REYNOLDS, OF NEW YORK, N. Y.

MODE OF MAKING GUTTA-PERCI-IA CORD.

Specification of Letters Patent No. 16,215, dated December 9, 1856. I

To all whom "it may concern." with which it is intended to work. Each Be it known that 1, JAMES REYNOLDS, of die should be rather larger than the grooves the city, county, and State of New York, with which it is intended to work. The pair have invented a new and Improved Process of grooves forming an aperture of the in- 60 of Finishing Grutta'Percha Cords; and I tended size of the finished cord or exterior hereby declare that the following is a fu of the tubing, and the die being smaller than clear, and exact description of the same, refth rd r xt ri r f th t bi b f re it i erence being had to the accompanying drawoperated upon. ings, forming part of this specification, 111 The cord or tubing G to be operated upon 10 which which is shown in red color in both figures, Figure 1, is a vertical central Section O is brought to the machine in the condition in the machine and Fig. 2, a front View of the which it comes from the machine in which die and rollers. it has been molded. To introduce it to the Similar letters of reference ind cate C 1 machine, the screws Z), (Z, are unscrewed and 15 responding parts in both figures. one end of it is led through the die under This invention consists in a novel process the lower roller and between the rollers, of finishing gutta percha Cold, by means 0f after which, the screws 6, (Z, are screwed dies and grooved rollers arranged and operd w Rotary m ti i th ive to the ating together as herein ClESClilJQCl, said dies rollers by uitable means in the direction of 20 being of somewhat larger diameter than the th arrows shown upon them and the cord grooves in the rollers and the cord having or tubing is drawn by the bottom roller a windlass action feed given it by the rollers, (which, by its arrangementrelatively to the all as herein and for the purposes set forth. di t as a i dl th h th di To enable others to make and use my inafter which it passes through the rollers and 25 vention, I will proceed to describe it with i d t d b an tt d t Over th t reference to the drawing. roller and laid on the floor or on a suitable A, is a bedplate supporting two standreceptacle, in a coil. By this process the ards B, B, which contain the bear ngs cord or tubing is subjected to three distinct the pair of horizontal grooved rollers C, C. operations, viz: 1st. it is drawn, condensed 30 These rollers have several sets of grooves and equalized i Size7 b passing th h f, f, for cord or pipe of different si eS a the die, 2nd, it is stretched between the die the upper one has its bearings a, a, fitted to and the rollers, and 3rd, it is slightly com the standards B, B, so as to be adjus ab pressed between the rollers to finish it with under the control of a screw 6. They are a smooth surface. 35 geared together to rotate at the same ve- The relative sizes of the die and grooves locity. should be such as to bring the guttapercha E, is a standard having an opening (Z, to what is known in the manufacture of that whose sides are made of V form in the horimaterial as the fixed point which is that zontal section of their lower parts, for the condition in which it will just stretch no 40 purpose of holding the upright die D, D, more and has the greatest density, and tewhich is made in two parts each part connacity in which condition it is best adapted taining half the die. The lower part D for most purposes. of the die rests upon the bottom of the open This machine is principally intended for ing (Z, on the standard E, and the upper part the finishing of gutta percha cord, but may 45 is intended to be held down upon it by a be used for tubing, though for finishing tubscrew 0, in the top of the standard. The ing I intend generally to employ a mandrel interior of the die is of rounded form as in connection with the die to regulate at the shown in Fig. 1. The standard E is placed same time the interior size and thickness. as close as practicable to the rollers C, C", I do not claim as new a mere combination 50 and the die should stand nearly opposite the of dies and rollers, as such, variously arbottom of the lower roller C. The standard ranged, is common in the manufacture of should be provided with a number of dies, metallic tubing and other articles; but corresponding to the number of the several Vhat I do claim as a new and useful imgrooves of the rollers and should be adjustprovement in the manufacture of gutta 55 able to bring the die which is placed in it, percha cord isopposite to that set of grooves in the rollers The process herein described of finishing gutta percha cord, by means of the dies D D, and grooved rollers C C, arranged and operating together and on the cord as described, the said dies being of larger diameter than the grooves in the rollers and serving to close up flaws, draW and compress the cord and equalize its size, While the smaller grooves in the rollers serve to slightly compress and give a smooth finish to the cord 10 and establish or sustain the feed of the cord,

Without risk of bruising, by attrition, through a Windless action as specified, and, by which combined action of the dies and rollers, the cord is stretched to its fixed point between the dies and rollers as set 15 forth.

JAMES REYNOLDS. l/Vitnesses S. H. WALES, J AS. F. BUGKLEY. 

